阅读说明：本技术 一种抗压阻燃纸箱的制备方法 (Preparation method of compression-resistant flame-retardant carton ) 是由 陈世宏 陈芊如 陈心怡 邵芯然 陈绮荞 于 2019-09-28 设计创作，主要内容包括：本发明公开了一种抗压阻燃纸箱的制备方法,包括如下步骤：(1)将瓦楞纸浸泡在氢氧化钾溶液中进行打浆,加入改性石膏纤维混合,得到纸浆；(2)将改性蒙脱土、硅酸钠、纳米三氧化钼搅拌混合得阻燃剂；将阻燃剂、聚丙烯酰胺、三聚氰胺、羟甲基纤维素钠混合后,加热搅拌,加入聚乙烯醇、氧化淀粉和丙烯酸胶乳,混合均匀,制成胶液；(3)将步骤(2)得到的阻燃剂与步骤(1)得到的纸浆混合,经抄纸得到纸张；(4)将纸张用步骤(2)得到的胶液进行表面施胶,干燥得到抗压阻燃瓦楞纸板；(5)将抗压阻燃瓦楞纸板进行切割、碰线、切角、顶箱操作,即制作成抗压阻燃纸箱。本发明制备的纸箱具有良好的阻燃抗压效果。(The invention discloses a preparation method of a compression-resistant flame-retardant carton, which comprises the following steps: (1) soaking corrugated paper in a potassium hydroxide solution for pulping, adding modified gypsum fibers, and mixing to obtain paper pulp; (2) stirring and mixing the modified montmorillonite, sodium silicate and nano molybdenum trioxide to obtain a flame retardant; mixing a flame retardant, polyacrylamide, melamine and sodium carboxymethylcellulose, heating and stirring, adding polyvinyl alcohol, oxidized starch and acrylic latex, and uniformly mixing to prepare a glue solution; (3) mixing the flame retardant obtained in the step (2) with the paper pulp obtained in the step (1), and making paper to obtain paper; (4) surface sizing is carried out on paper by using the glue solution obtained in the step (2), and the paper is dried to obtain the compression-resistant flame-retardant corrugated board; (5) and cutting, line collision, corner cutting and box jacking operations are carried out on the compression-resistant flame-retardant corrugated board, and then the compression-resistant flame-retardant carton is manufactured. The carton prepared by the invention has good flame-retardant and pressure-resistant effects.)

1. The preparation method of the compression-resistant flame-retardant carton is characterized by comprising the following steps of: the method comprises the following steps:

(1) soaking corrugated paper in 1-2% potassium hydroxide solution, pulping at the rotation speed of 900-1200r/min, adding modified gypsum fibers into the pulp, uniformly mixing, standing the obtained pulp liquid for 3-6h, removing suspended impurities, performing centrifugal separation, washing the obtained pulp to be neutral, and filtering for later use;

(2) stirring and mixing the modified montmorillonite, the sodium silicate and the nano molybdenum trioxide uniformly according to the proportion to obtain a flame retardant; mixing flame retardant, polyacrylamide, melamine and carboxymethylcellulose sodium, heating to 40-55 deg.C, stirring for 5-12min, adding polyvinyl alcohol, oxidized starch and acrylic acid latex, mixing, heating to 55-65 deg.C to obtain glue solution, and cooling to room temperature;

(3) crushing the flame retardant obtained in the step (2) by a grinding machine, mixing the crushed flame retardant with the paper pulp obtained in the step (1), pouring the mixture into a paper machine, making paper sheets by the paper machine, and drying the paper sheets by hot air to obtain paper sheets;

(4) carrying out surface sizing on the paper obtained in the step (3) by using the glue solution obtained in the step (2), and carrying out hot-pressing drying to obtain the compression-resistant flame-retardant corrugated board;

(5) and (4) cutting, line touching, corner cutting and box ejecting operations are carried out on the compression-resistant flame-retardant corrugated board obtained in the step (4), and then the compression-resistant flame-retardant carton is manufactured.

2. The method of making the compression resistant flame retardant carton of claim 1, wherein: the modified gypsum fiber in the step (1) is prepared by the following method: and infiltrating gypsum fibers into the graphene slurry, then adding acrylamide, oxidized starch and gelatin, simultaneously adding an initiator, stirring for reaction, filtering and drying to obtain the graphene-based composite material.

3. The method of making the compression resistant flame retardant carton of claim 1, wherein: the adding amount of the modified gypsum fiber in the step (1) is 5-15% of the total amount of the slurry.

4. The method of making the compression resistant flame retardant carton of claim 1, wherein: the modified montmorillonite in the step (2) is prepared by the following method: adding nano montmorillonite into surfactant solution, performing ultrasonic dispersion, adding aminosilane coupling agent, stirring, and drying to obtain modified montmorillonite.

5. The method of making the compression resistant flame retardant carton of claim 1, wherein: the flame retardant in the step (2) is prepared by uniformly mixing and stirring modified montmorillonite, sodium silicate and nano molybdenum trioxide according to the weight ratio of 1:1-2: 1-3.

6. The method of making the compression resistant flame retardant carton of claim 1, wherein: the glue solution in the step (2) comprises the following components in parts by weight: 20-30 parts of a flame retardant, 20-30 parts of polyacrylamide, 15-20 parts of melamine, 15-20 parts of sodium carboxymethyl cellulose, 10-15 parts of polyvinyl alcohol, 10-15 parts of oxidized starch and 3-8 parts of acrylic latex.

7. The method of making the compression resistant flame retardant carton of claim 1, wherein: the addition amount of the flame retardant in the step (3) is 5-10% of the total amount of the paper pulp.

8. The method of making the compression resistant flame retardant carton of claim 1, wherein: the sizing concentration in the step (4) is 15-20 wt%.

9. The method of making the compression resistant flame retardant carton of claim 1, wherein: and (4) drying at 65-80 ℃ for 1-3 h.

Technical Field

The invention belongs to the technical field of carton processing, and particularly relates to a preparation method of a compression-resistant flame-retardant carton.

Background

The paper box is the most widely used packing product, and has various specifications and models, such as corrugated paper boxes, single-layer cardboard boxes and the like according to different materials. The existing carton still has certain problems, such as the strength sole of the carton is not pressure-resistant, in the transportation process, the article in the carton is damaged due to the collision of the carton caused by external force, the good packaging effect on the article is difficult to play, and the carton can be damaged when exposed fire is met, the existing flame-retardant carton is generally coated with flame retardants, and the flame-retardant carton cannot have a good flame-retardant effect and cannot achieve the flame-retardant purpose. Therefore, further research into cartons is needed to better accommodate the evolving needs of today's society.

Disclosure of Invention

The invention aims to overcome the defects and provides a preparation method of a compression-resistant flame-retardant carton.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a preparation method of a compression-resistant flame-retardant carton comprises the following steps:

(1) soaking corrugated paper in 1-2% potassium hydroxide solution, pulping at the rotation speed of 900-1200r/min, adding modified gypsum fibers into the pulp, uniformly mixing, standing the obtained pulp liquid for 3-6h, removing suspended impurities, performing centrifugal separation, washing the obtained pulp to be neutral, and filtering for later use;

(2) stirring and mixing the modified montmorillonite, the sodium silicate and the nano molybdenum trioxide uniformly according to the proportion to obtain a flame retardant; mixing flame retardant, polyacrylamide, melamine and carboxymethylcellulose sodium, heating to 40-55 deg.C, stirring for 5-12min, adding polyvinyl alcohol, oxidized starch and acrylic acid latex, mixing, heating to 55-65 deg.C to obtain glue solution, and cooling to room temperature;

(3) crushing the flame retardant obtained in the step (2) by a grinding machine, mixing the crushed flame retardant with the paper pulp obtained in the step (1), pouring the mixture into a paper machine, making paper sheets by the paper machine, and drying the paper sheets by hot air to obtain paper sheets;

(4) carrying out surface sizing on the paper obtained in the step (3) by using the glue solution obtained in the step (2), and carrying out hot-pressing drying to obtain the compression-resistant flame-retardant corrugated board;

(5) and (4) cutting, line touching, corner cutting and box ejecting operations are carried out on the compression-resistant flame-retardant corrugated board obtained in the step (4), and then the compression-resistant flame-retardant carton is manufactured.

Preferably, the modified gypsum fiber in the step (1) is prepared by the following method: and infiltrating gypsum fibers into the graphene slurry, then adding acrylamide, oxidized starch and gelatin, simultaneously adding an initiator, stirring for reaction, filtering and drying to obtain the graphene-based composite material.

Preferably, the modified gypsum fiber in the step (1) is added in an amount of 5-15% of the total amount of the slurry.

Preferably, the modified montmorillonite in the step (2) is prepared by the following method: adding nano montmorillonite into surfactant solution, performing ultrasonic dispersion, adding aminosilane coupling agent, stirring, and drying to obtain modified montmorillonite.

Preferably, the flame retardant in the step (2) is prepared by uniformly mixing and stirring modified montmorillonite, sodium silicate and nano molybdenum trioxide according to the weight ratio of 1:1-2: 1-3.

Preferably, the glue solution in the step (2) comprises the following components in parts by weight: 20-30 parts of a flame retardant, 20-30 parts of polyacrylamide, 15-20 parts of melamine, 15-20 parts of sodium carboxymethyl cellulose, 10-15 parts of polyvinyl alcohol, 10-15 parts of oxidized starch and 3-8 parts of acrylic latex.

Preferably, the addition amount of the flame retardant in the step (3) is 5-10% of the total amount of the pulp.

Preferably, the sizing concentration of step (4) is 15 to 20 wt%.

Preferably, the drying temperature in the step (4) is 65-80 ℃, and the drying time is 1-3 h.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention adopts the two-stage combined flame retardant technology of adding flame retardant into the pulp and surface sizing flame retardant, the composite flame retardant filler added into the pulp is added into the pulp preparation system, and then a layer of flame retardant adhesive is coated on the surface of paper in a surface sizing mode to prepare the paper box, the composite flame retardant system can generate synergistic flame retardant effect, the limit oxygen index of the compression-resistant flame retardant paper box is 44-45%, and the flame retardant property of the paper box is ensured.

(2) According to the invention, the graphene modified gypsum fiber is added into the paper ingredient, and by virtue of the high toughness of the gel coating layer and the enhancement effect of the graphene, the affinity between the gypsum fiber and paper pulp can be increased, the adhesive force between the modified gypsum fiber and the paper can be increased, the strength and toughness of the paper can be obviously improved, so that the subsequently prepared paper box has excellent compressive strength, and articles in the paper box can be effectively protected.

(3) The method has the advantages of simple process, low production cost and convenient operation, and the prepared carton has good flame retardant and compression resistance, extremely high falling resistance and wider market prospect.

Detailed Description

The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.